Yokogawa PC-Based MX100 - Manual (Page 77)

3-5
IM MX100-01E
Troubleshooting and Maintenance
3
2
1
4
5
Index
The measured value is not correct.
Probable Cause Corrective Action Ref. Page
The input wiring is not correct. Check the input wiring. 2-11 to 2-18
The measured value indicates +Over or Over.
The measurement range setting and input
range do not match.
Change to an appropriate setting. *
The temperature error is large or is unstable.
The TC type setting and the type actually
connected are different.
Change to the correct setting. *
The temperature error is large or is unstable.
The RJC setting is not correct.
Change to the correct setting. *
The temperature error is large or is unstable.
The wind is hitting the terminals.
Block the wind from hitting the terminals. -
The temperature error is large or is unstable.
The ambient temperature change is drastic.
Suppress changes in the ambient temperature such as by placing
the MX100 in a box.
-
The temperature error is large or is unstable.
There is an error in the wiring resistance (in
the case of an RTD).
Match the thickness and length of the three input wires. 2-11
The measurement error is large or is unstable. Take measures against noise effects. 2-24
The measurement error is large or is unstable.
Effects from the signal source resistance.
Reduce the signal source resistance such as by inserting a
converter.
-
The temperature error is large or is unstable.
Effects from parallel connections.
Stop parallel connections.
Do not use the burnout setting.
-
Measured values from the strain gauge type
sensor are not correct.
When using a sensor without a remote sensing wire, use the
DV450-001 (conversion cable).
-
On the strain module (-B12, -B35), the gauge
method and dip switch settings are not correct.
Enter the correct settings. 2-12 to 2-15
On the strain module (-B12, -B35), the gauge
resistance and internal bridge resistance
values are different.
Use a module that supports the resistance value of the strain
gauge (For 120 Ω, -B12, and for 350 Ω, -B35).
2-12 to 2-15
On the strain module, scaling is not set
appropriately according to the gauge method.
(for 2 gauge, 4 gauge methods, the amount of
strain is doubled or quadrupled.)
Displayed with 1 gauge method conversion. Set scaling
appropriately according to the gauge.
4-23
On the strain module (-NDI), a strain gauge
type sensor without a remote sensing wire is
being used.
When using a sensor without a remote sensing wire, use the
DV450-001 (conversion cable).
-
* See the MX100 Standard Software User’s Manual (IM MX180-01E).
Alarms are not output.
Probable Cause Corrective Action Ref. Page
There is a problem in the alarm setting. Make the alarm and output relay settings appropriate.
Both the alarm and output relay must be set appropriately.
*
* See the MX100 Standard Software User’s Manual (IM MX180-01E).
The CF card is not detected.
Probable Cause Corrective Action Ref. Page
There is a problem with the CF card. Replace the CF card.
Eject and format the CF card, then insert it again.
2-27
3.2 Troubleshooting